Fluid-controlled drill-bit swaging and sharpening machine.



J. G. LEYNER. FLUID CONTROLLED DRILL BIT SWAGING AND SHARPENING MACHINE.

APPLICATION FILED AUG. 13, 1907.

Patented Aug. 24, 1909.

JOHN GEORGE LEYNER, 01: DENVER, COLORADO.

FLUID-CONTROLLED DRILL-BIT SWAGING AND SHARPENING MACHINE.

Specification of Letters Patent.

Patented Aug. 24, 1909.

Application filed August 13, 1907. Serial No. 388,351.

To all whom it may concern:

Be it known that I, J OHN GEORGE LEYNER,

a citizen of the United States'of America, residing in the city and county of Denver and State of Colorado, have invented a new and useful Fluid-Controlled Drill-Bit Swaging and sharpening Machine, of which thefollowing is a specification.

My invention relates to a fluid or pneumatically controlled and operated rock cutting drill-bit sharpening machine; and the object of my invention is: to provide a simple, durable, accurate rock cutting lip multiple and interchangeable die holding and dolly striking compressed air or other fluid controlled and operated drill-bit holder,- worker, former, and sharpener for the rock cutting drill-bits of rock drilling engines. I attain this object by the mechanism illus trated in the accompanying drawings, in which: Figure 1, is a front elevatioirof the improved drill sharpener. Fig. 2, is a perspective View of the upper presser die, and Fig. 3, is a perspective view of the lower presser die.

Similar characters of reference refer to similar parts throughout the several views.

Referring to the drawings, the'numeral 1, designates the supporting stand of my fluid controlled drill sharpener. This stand comprises a floor or foundation base 2, a hollow vertical column or standard 3, and a top or table portion 4, all of which are preferably made of circular form. Upon this supporting stand, I place the drill sharpener and holder, which comprises a cylinder 5, which sits on and is secured to the table portion of the stand by any suitable means, but preferably by bolts or cap screws 6. This cylinder is open at its bottom, the table portion forming its lower cylinder head, and it is closed at its upper end by an integral head 7. This cylinder is provided with an.

axial bore or piston chamber, in whicha pis a short piston-rod 9, that extends through an aperture, formed in the upper head of the cylinder. A vertically projecting standard 11, is formed on the top of the cylinder, having a central bore, which forms a continuation of the aperture 10, in the i nper cylinder head 7. The'thickness of thi standard is less than the. diameter of the piston stem, hence its bore 12 isformed in diametrically opposite sides of the standprovided with tangnlar portion,

ard, while the piston rod projects laterally through the opposite faces of the standard as shown. The upper end of the piston rod, however, is reduced in width to correspond to the thickness of the standard, and in this I upper end is formed a recess, in which is secured a drill holding die 13.- The bore of the guide-way or standard 11, extends up into the standard a shortdistance above the end of the piston stem. and at its upper end it terminates into a semi-circular curve, in which a die 16 is fitted. which is a counterpart of the die 13.

, My invention contemplates the use of an additional set of vise dies from that of the drill-bit holding and rib upsetting dies. These additional vise dies are adapted to press out and shape up the rock cutting lips after they are first formed on the drill steel, and are used independently of the drill-bitgripping and swaging dies, and in alternate order with them once or twice or three or more times, in forming and shaping up and finishing the rock cutting lips on the drill hits, as is necessary. There are several ways in which these jaw dies can be coiiper" atively used with the swaging jaws, and connected to the piston rod and standard to be fluid or pneumatically operated and controlled to work out the rock cutting lips of the drill bits, but I preferably carry out this feature of my invention in the following manner: Upon the front side of the standard, which is the side from which the drill-bits are inserted in the jaw dies constitutin the vise, I form a forwardly projecting Tug portion 38', to the under side of which I' removably secure by bolts a swage die 39', which I term a clearance swage die. This swage die comprises a depending V shaped lip or die portion which is adaptedv to work into the clearance spaces between the lips of the drill-bit, and a recwhich is adapted to'be removably secured by a set screw 41- to the under side of the projecting lug portion of the standard, On the piston rod, below this swage die, removably secure a similar V-shaped sw'ag'e die 42', which projects vertically upward in vertical alinenient with the swage die 39'. The swage die 42, is preferably made independent of its, support in order that other forms of swage dies ma y be used in forming and shaping the djls. This support comprises a block it", which is removably. secured by cap screws 45- to the side of the top 53*,at its outer end, and with a rear- 'Ward and downward angular topsurface -in any Above this lower 54 'to the projecting lug portion of'the upper presser die.

52, and arranged to register in vcylin'denand a cylindrical portion 41 formed piston rod. The swage die 42*, may be secured.to its supporting block desired manner, but I preferably provide the top of the block with a raised key lug 46 and form a key-way recess 1n the bottom of the swage die 42", to fit snugly but loosely over it, and provide a wide bearing surface on each side of the key way lug v for the base of the swage die to. sit on. Swage dies differing in form from the V-' shaped'die 42 and: adapted to be used with a diiierent form of drill tool steel, can be used on the block 44*, and are made interchangeable with the die 42 The swages are slightly thicker than the'support 4A, and in operation they are held upon the support by awasher 50", which is slipped upon the adjacentbolt45, and thus clamps the swage against the piston stem, and holds it securely 1n place. The block 44 is also provided with a die 52 for pressing outthe ribs of cutting lips of the drill-bit. This die I term the lower presser or forming die. This presser die 52, com rises. a vertical extension, which is 'provi ed with a flat 53 -on' its inner edge (see Fig. 3), of the same angle of inclination as the upsetting die portion of the drill-bit gripping die 13. presser die and in vertical alinement with it, I secure by a cap screw standard, a die block 55*, which I termthe This upper presser die comprises a block that is provided with a flat face die 55 on its outer .end, of the same size of the fiat face die 53 of the die alinement with the flat surface of the lower presser or former die, and with a rearward and upward diverging angular surface 55 on its inner side, arranged in alinement with the diverging angular surface 53 of the lower presser die. These two angular portions of these presser dies are adapted to permit the diverging conical head portion of the ribs of the drill-bit which is formed in the conical' entrance to the half dies 13 and 16, to be pressed down smooth on their edges, whilethe flattop dies 53 and 55 of'these die blocks 55 and 44 and the die portion 52 of the block 44 are used to press the sides of the ribs of the drill-bit down.

The cylinder: is provided with a val v'e chest 38, which comprises a flange portion 39-, that is bolted or -is otherwise secured to a base portion 40, formed on the side of the on which die.

on the flanfge portion. Thls cylindrical P tion 41, 1s

ormed with a valve chamber, and I a cover 35 is threaded to it,- and is provided l with a-hexagonal wrench receiving portion by'whrch the cover may be screwed into it. I An axial aperture is formed through the,

cover, and a. valve stem it extends into and through the cap and is coupled to the valve, and to its outer end a handle 4 T is secured.

The operation of sharpener is as follows: A supply of compressed air under the desired pressure is led from a source of supply through a pipe or hose (39, a fragment of which is shown in Fig. l, to the lower end of the cylinder 5, below the piston, which will thereby be raised. A drill bit or a bar of drill steel, the point of which is to be resharpened, or a new set of rock cutting lips is to be formed, is previously placed in the lower half die 13 of the vise, which is moved up with the piston 9 until the bit is clamped between the. dies 13 and 16, when its end is formed or sharpened in the manner shown and described on June 8,1907, No. 377,985. This first rock cutting lips forming action of the doll y invariably leaves a somewhat ragged tin of metal in the bottoms of the V-shaped spaces between the rock cutting lips, and in addition, the ribs back of the lips are not as smoothly, regularly, and as fully formed by this first action of the dolly as is r uired in a perfectly formed sharpened dri l-bit; consequently, it is necessary that the fins of metal at the bottoms of the interstices between the lips be pressed smoothly down, as these interstices form the clearance passages for the rock cuttings from the cutting edges of the lips between and past the ribs of the head portion to the body of the drill bit, and also that the ribs be smoothly pressed out along their sides between each other. These requirements lead to a working which I term the second workin which to admit compressed air to the top of the vise operated cylinder and piston, which causes the piston rod and the lower vise die to move infiantly downward, thus releasing the drill ear. The operator then moves the drill bit to the V- shaped swaging dies and places the ribs over the edge of the lower die so that the edge of the die extends into the space between the ribs, and consequently such -edges or uneven welts or fins of metal as have been swaged up by the first working action of the dolly bear directly on the cd e of the lower The throttle valve is tien o sued by turning the crank, which causes tiie piston rod to instantly rise and-moves the up against the upper swage' die, which depends into the upper s ace of ribs on the opposite side of the drill liar, and the upward pressure of the lower die against die swages the of me al between the ribs of the drill bit and also the adjacent sides of the ribs ut smwtn, and also shares these alearanee splices out smooth, and presses bot the up er my pneumatic drill,

in an application filed by medrill bit jaws, which is done turning thedrill bit tween them until they are smooth and even,

tom apexes into sharp clear straight lines] down even with the longitudinal plane of the body of the drill bar. The operator. then instantly reverses the air pressure to the top of the piston, and over the dies, and

places the next pair of cutting ribs over the edge of the lower die I so that the die projects into the space bei tween them, and again turns on the compressed air and raises the drill bit into the upper die and swages these sides and hottoms of this pair of cutting ribs out, and then releases and lowers the vise, piston, and dies, and again turns the drill bit on the lower die to the next pair of ribs, and repeat-s the operation until all of the sides and the fins and the bottom apexes of the ribs have been pressed out smooth and to the depth desired' The operator having swaged out the sides of the ribs and the bottoms of the spaces benext )roceeds to the third working, which consists of third, the thinning and narrowing of the ribs of the diverging conical head portion, which as a rule are too thick, and at the same time to widen the clearance spaces between the ribs, which as a rule are left too narrow by the first working action of the dolly, and in order to accomplish this, he places the ribs of the drill-bit one at a time on the lower presser die, placing the diverging edges of the ribs on the angular die surface of the lower presser die, and turns on air pressure into the cylinder, which forces the lower presser die up, and the diverging edge of the vertical upper lip against the angular die surface and the upper side surface of the side rib against the fiat die surface of the upper presser die, and thus presses the edges and sides of the ribs of the diverging conical head as thin as desired. The drawing out of the of the drill-bit out) ribs can be done by alternately applying the drill-bit to the swaging and presser dies 1f desired. The drill-bit is then returned to the gripping. and holding vise dies, and given the finishing Working. a

My invention contemplates broadly a fluid or compressed air controlled vise for holding a drill-bit, and a ,plurality of interchangeable and renewable vise dies fluidcontrolled in the action and adapted to form perfect rock cutting lips, supporting ribs, and clearance spaces on rock cutting drill-bits.

While I have illustrated and described the preferred construction and arrangement of my fluid controlled or pneumatic drill sharpener, I do not wish to be'limited to the precise construction and arrangement shown and described, as many changes might be made without departing from the spirit of my invention.

Some of the features of this invention are shown in my pending applications Serial Numbers 377,985 and 400,955.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is:

In a fluid o erated drill sharpener, the combination 0 the base, the cylinder, the piston, the supporting yoke above said piston on said cylinder, and the fixed V-sha-ped clearance spacing half die fixed to said yoke, with a V-shaped half die secured to said piston to register opposite to and in alinement with said yokes fixed clearance spacing half die, and a valve and ports operatively connected to said cylinder and piston.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN GEORGE LEYNER.

Witnesses:

JOHN A. FARWELL, E. T. STEVENSON. 

